Gas-burner.



G. W. GRAVES.

GAS BURNER.

APPLICATION FILED MAY 28. i915.

Patented Aug. 29, 1916.

IMD

GEORGE W. GRAVES, OE CINCINNATI, OHIO, .ASSIGNOR TO THE GRAVES SUPPLY CO., OE CINCINNATI, OHIO, A CORPORATION 0F OHIO.

eas-Brianna.

Application filed May 28, 1915.

To all 'whom it may concern:

Be it known'that I, GEORGE W. GRAVES, a citizen of the United States, residing at Cincinnati, in the county of I-Iamilton and State of Ohio, have invented certain new and useful Improvements in Gas-Burners; and I do hereby declare the following to be a full, clear, and eXact description of the same, reference being had to the accompanying drawings, forming apart of this specifcation, and to the reference-numerals marked thereon. l

My present invention has for its object to provide an improved gas burner for gas stoves or ranges and further, to provide what may be termed a gas burner {ix-ture which comprises in addition to the burner proper the gas inlet pipe on which it is supported, said pipe itself being attached permanently to the stove body.

My invention has for its further object to provide means for mounting the burner on the gas inlet pipe whereby the burner may be adjusted in different planes of elevation to position the flame relatively to the top lof the stove, according to the heat units contained in the gas supplied to the burner or to the pressure of the gas.

'Io these and other ends the invention consists in certain improvements and combinations of parts, all as will be hereinafter more fully described the novel features being pointed out in the claims at the end of the specification'.

In the drawings: Figure 1 is a top plan view of a burner fixture constructed in accordance with my present invention; Fig. 2 is a central longitudinal sectional view showing the burner in one position of adjustment; Fig. 3 is a similar View in side elevation showing the burner in a different position of adjustment, and Fig. l is a detail view of the inner end of the burner tube.

Similar reference numerals throughout the several figures indicate the same parts.

In the construction of gas stoves or ranges, the stoves when built by the manufacturer are primarily intended to be utilized either with natural gas or manufactured gas and because of the physical properties of natural gas and the relatively higher pressure at which it is supplied to the consumer, the stoves in which it is to be used are furnished with closed tops, the same as the stove tops of a coal range, and

Specification of Letters Patent.

ratentea aug. aa, raie. serial no. 31,040.

the burner or burners thereunder are spaced a greater distance beneath the top of the stove than is the case where manufactured gas 1s used. In the gas stoves designed for the use of manufactured gas, the tops are open, in the form of a grating which supports the cooking utensils, and the gas burners are located so that the flames of gas emitted from the orifices will impinge agamst the bottom of the cooking vessel and be diverted laterally thereunder. No especlal construction of burner is required to adapt it particularly for the use of different gases but they must be located in the manner described on the particular stove to which theyy are adapted by the manufacturer, which fact necessitates a change in the length and sizes of the piping connections mounted on the stove and the brackets or supports which hold these parts in place.

One of the objects of mypresent invention is to provide a gas burner fixture which maybe utilized by the manufacturer in the construction of stoves adapted for the burning of either manufactured or natural gas by means of which the gas inlet pipe on all stoves will be mounted in the same position, thus standardizing the other fittings of the stove and which may be adapted for the burning of either kind of gas by simply adjusting the burner proper upon the gas inlet pipe.

In illustrating my present invention, I have shown in F ig. 2 a stove adapted for the use of manufactured or artificial gas, comprising the top 1 which is provided with the open grid 2, and in Fig. 3 the solid stove top of a natural gas stove is shown embodying the top l containing the insert 3 which is provided with apertures that are normally closed by the stove top covers, a ring cover composed of the parts 4 and 5 being shown. The body of the stove further comprises a bracket, ledge or cross rod, indicated by 6, which forms the member for supporting the burner or burners in operative position.

The gas burner fixture embodies both the gas inlet pipe 7 and the valve 8, the former having the enlarged mixing chamber 9 at its outer end when it is supported upon the inlet vmalve 8 communicating with the manifold or gas pipe 9a which, it will be understood, is connected with a source of gas supply. The other end of the inlet pipe is tapered, as shown in the sectional view Fig.

2, from the restricted outlet 10 of the mixing chamber, upwardly curving elbow 11 terminating in the collar 12, which may be formed integrally with the inlet pipe, or as a separate piece driven into place, a construction which may be utilized to facilitate the casting of the pipe. At the inner end of the latter is a projection or finger 13 which is of such shape and dimensions as to coperate with the bracket 6 of the stove to which it may be secured by any suitable form of fastening device such as a bolt 14.

The valve 8 isl detachably and adjustably supported upon the inner end of the gas inlet pipe and is provided upon its under side with a collar or thimble 15 forming a sleeve surrounding the collar 12 so that the iow of gas, which is always in an upward direction, 'enters the burner without any tendency to work its way outwardly and escape through the joint formed between the sleeve and the collar.

In order to provide-burners which will occupy different positions relatively to the top of the stove, the sleeves 15 may be made of different lengths, on dierent burners, and the latter may be interchangeable on the gas inlet pipes, but in order to make each burner universally adjustable on its respective inlet pipe, .I prefer to arrange coperatmg interlocking members on the burner sleeves and gas inlet pipe collars and to con-- nect the sleevesand collars by means of slip joints. Surrounding the` collar 12 are segmental shoulders 16, and on the lower end of the sleeves 15 are downwardly extending projections or legs 17 which, when the burner is' in its lowermost position, as shown in Fig. 3, project between said shoulders. 16 and when elevated and rotated partially, said legs rest on the shoulders 16. When the burner is in its lowermost position it is locked against rotary movement by the engagement of the edges of thelegs 17 with the ends of the segments 16, and can only be displaced by raising it vertically. For the purpose of similarly` locking the burner when it is in the elevated position, as shown. in Fig. 2, there is provided at each end of the shoulders 16, lugs 16, the spaces between the latter forming seats in which the extremities of the legs 17 may rest.

The burner proper which also forms an important feature of my present invention comprises a central portion or body 18 having at its lcenter the inlet through which the gas is supplied from the pipe on which it is supported, radiating from the body are a plurality of tubular arms 19, four being shown in the present instance, each of which is divided intotwo branches 20, 20. The side walls yof-the arms 19 and 20 preferably converge toward their upper edge on which are located a plurality of projections 21 each of which is perforated to provide a gas jet orifice.` The sloping sides of the arms of the burner and the arrangement of each jet oriice in an independent projection or burner tip enables the currents of air to commingle with the gas as it is emitted to obtain a very perfect combustion and the development of the full value of the heat units in the gas supplied to the burner.

The reasons given for the desirability of providing an adjustable burner, while they are the principal ones, are not the only arguments to be advanced from a manufacturing standpoint, in favor of a fixture embodying my present invention, as it will be under.- stood that in individual cases, it is often desirable to vary the heights of particular burners according to the size and area of the latter and the intensity of the fiame which it is desired to produce over a given area of heating surface. It ought also be 'remarked that the arrangement of the parts disclosed possesses a further advantage in that the burners may be readily removed by the operator when it becomes desirable to clean them, but it is to be observed that this is a matter of infrequent occurrence because in the structure disclosed, the joint formed between the sleeve on the bottom of the burner and the gas inlet pipe is so far removed from the gas outlet orifices and the shell of the burner in the vicinity of said orifices is a solid casting and contains such a relatively small portion of metal that the usual condensation which causes rusting of the parts is obviated.

I claim as my invention:

1. The combination with a gas stove body, comprising a top and a gas tube extending beneath the top increasing in diameter toward its inner end and terminating in an upturned portion to forma gas eX- pansion chamber, of a burner having a tubular projection on its lower. side engaging said upturned portion, and means carried by the upturned portion coperating with the tubular projection for varying the height of the burner relatively to the top of the stove. v

2. A gas burner xture for gas stoves,

- comprising a gas inlet pipe having an inner a tubular extension on its lower side engaging the upwardly opening discharge member, and means carried by said member adapted to support the tubular extension at diiferent heights relatively to the topof the stove.

3. A gas burner outfit for gas stoves, comprising a gas inlet pipe adapted to form a permanent part of the stove having an upwardly extendingdischarge member provided with a plurality of shoulder portions positioned at relatively dilferent heights upon the discharge member, and a burner connected with the discharge member and provided with means for engaging said shoulder portions whereby to support the burner at relatively diHerent heights upon the discharge member. ,V

4. A gas burner fixture, comprising a gas inlet member having an upwardly extending discharge portion provided with a plurality of lugs positioned at relatively different heights upon the discharge portion, and a burner connected with the discharge portion and provided with means for engaging said lugs in relatively dierent positions whereby to support the burner at diii'erent heights with respect to said discharge portion.

5. A gas burner fixture comprising a gas inlet member having an upwardly extending discharge portion provided with a plurality of lugs positioned at relatively different heights upon the discharge portion, and a burner connected with the discharge portion by means of a sleeve having projections thereon, the sleeve [and projections each being adapted to engage one or more of said lugs whereby to position the burner at relatively dilierent heights upon the discharge portion.

6. A gas burner fixture, comprising a gas inlet member having an upwardly extending discharge portion provided with a plurality of lugs, a burner, a sleeve connected with the burner at one end and provided with spaced extensions at the other end, the sleeve and extensions each being adapted to engage said lugs whereby to position the burner at relatively dierent heights upon the discharge portion.

GEORGE W. GRAVES.

Witnesses:

WILLIAM L. MERSFELDER, NICHOLAS P. SGHINDLER. 

